Hi,
I have more info concerning my gnat_malloc problem.
I watched the code in gcc/ada/gcc-interface/trans.c and found the location
where malloc_decl tree is built.
In gigi ()function (trans.c:411), the ftype for malloc_decl is done this way :
ftype = build_function_type_list (ptr_void_type_node, sizetype, NULL_TREE);
I looked at the code of build_function_type_list_1 in tree.c and found that
stdargs function are built with their chained list of argument ending with a
void_list_node :
{
last = args;
args = nreverse (args);
TREE_CHAIN (last) = void_list_node;
}
But I also noticed that void_list_node was a null pointer!! instead of being a
node with TREE_VALUE = void_type_node and no TREE_CHAIN (as described in
tree.h)
So I wondered, where should void_list_node be initialized in GNAT frontend and
noticed that the initialization of void_list_node was done AFTER its use to
declare ftype for malloc_decl.
ftype for malloc_decl is initialized in gigi() function at trans.c:411
whereas void_list_node in only initialized in gigi() function at trans.c:665 by
a call to gnat_install_builtins() ---> install_builtin_elementary_types() -->
void_list_node = build_void_list_node ();
It seems like a bug. Is it a known one ? someone has the proper fix ? I put the
call to gnat_install_builtins() higher inside gigi() and it solve my current
problem but I'm not sure exactly when it has to be called and if there are bad
side effects.
Regards,
Selim Belbachir
